<template>
  <div class="mui-numbox" data-numbox-min="1">
    <button class="mui-btn mui-btn-numbox-minus" type="button">-</button>
    <input
      id="test"
      class="mui-input-numbox"
      type="number"
      value="1"
      @change="countChanged"
      ref="numbox"
    />
    <button class="mui-btn mui-btn-numbox-plus" type="button">+</button>
  </div>
</template>
<script>
  import mui from '../../lib/mui/js/mui.min.js'
  export default {
    mounted() {
      //加载完成的生命周期
      //初始化数字选择框
      mui('.mui-numbox').numbox()
    },
    methods: {
      countChanged() {
        this.$emit('getcount', parseInt(this.$refs.numbox.value))
      },
    },
    props: ['stockQuantity'], //父组件传值，最大数量
    watch: {
      //监听接收到最大数量后，js设置选择框的最大值
      stockQuantity: function (newValue, oldValue) {
        //使用JS API设置numbox的最大值
        mui('.mui-numbox').numbox().setOption('max', newValue)
      },
    },
  }
</script>
<style lang="scss" scoped>
</style>